Re: [PATCH -next v2 8/9] block: fix null-pointer dereference in ioc_pd_init

[Tejun Heo]

On Thu, Dec 01, 2022 at 10:12:13AM +0800, Yu Kuai wrote:
> 1) By mentioning that "del_gendisk() is quiescing the queue", do you
> suggest to add rcu_read_lock()? This seems wrong because blk_iocost_init
> requires memory allocation.

Quiescing uses SRCU so that should be fine but I'm not sure whether this is
the right one to piggyback on. Jens should have a better idea.

Thanks.

-- 
tejun